// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "net/cert/cert_status_flags.h"

#include "base/logging.h"
#include "net/base/net_errors.h"

namespace net {

bool IsCertStatusMinorError(CertStatus cert_status)
{
    static const CertStatus kMinorErrors = CERT_STATUS_UNABLE_TO_CHECK_REVOCATION | CERT_STATUS_NO_REVOCATION_MECHANISM;
    cert_status &= CERT_STATUS_ALL_ERRORS;
    return cert_status != 0 && (cert_status & ~kMinorErrors) == 0;
}

CertStatus MapNetErrorToCertStatus(int error)
{
    switch (error) {
    case ERR_CERT_COMMON_NAME_INVALID:
        return CERT_STATUS_COMMON_NAME_INVALID;
    case ERR_CERT_DATE_INVALID:
        return CERT_STATUS_DATE_INVALID;
    case ERR_CERT_AUTHORITY_INVALID:
        return CERT_STATUS_AUTHORITY_INVALID;
    case ERR_CERT_NO_REVOCATION_MECHANISM:
        return CERT_STATUS_NO_REVOCATION_MECHANISM;
    case ERR_CERT_UNABLE_TO_CHECK_REVOCATION:
        return CERT_STATUS_UNABLE_TO_CHECK_REVOCATION;
    case ERR_CERTIFICATE_TRANSPARENCY_REQUIRED:
        return CERT_STATUS_CERTIFICATE_TRANSPARENCY_REQUIRED;
    case ERR_CERT_REVOKED:
        return CERT_STATUS_REVOKED;
    // We added the ERR_CERT_CONTAINS_ERRORS error code when we were using
    // WinInet, but we never figured out how it differs from ERR_CERT_INVALID.
    // We should not use ERR_CERT_CONTAINS_ERRORS in new code.
    case ERR_CERT_CONTAINS_ERRORS:
        NOTREACHED();
        // Falls through.
    case ERR_CERT_INVALID:
        return CERT_STATUS_INVALID;
    case ERR_CERT_WEAK_SIGNATURE_ALGORITHM:
        return CERT_STATUS_WEAK_SIGNATURE_ALGORITHM;
    case ERR_CERT_NON_UNIQUE_NAME:
        return CERT_STATUS_NON_UNIQUE_NAME;
    case ERR_CERT_WEAK_KEY:
        return CERT_STATUS_WEAK_KEY;
    case ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN:
        return CERT_STATUS_PINNED_KEY_MISSING;
    case ERR_CERT_NAME_CONSTRAINT_VIOLATION:
        return CERT_STATUS_NAME_CONSTRAINT_VIOLATION;
    case ERR_CERT_VALIDITY_TOO_LONG:
        return CERT_STATUS_VALIDITY_TOO_LONG;
    default:
        return 0;
    }
}

int MapCertStatusToNetError(CertStatus cert_status)
{
    // A certificate may have multiple errors.  We report the most
    // serious error.

    // Unrecoverable errors
    if (cert_status & CERT_STATUS_REVOKED)
        return ERR_CERT_REVOKED;
    if (cert_status & CERT_STATUS_INVALID)
        return ERR_CERT_INVALID;
    if (cert_status & CERT_STATUS_PINNED_KEY_MISSING)
        return ERR_SSL_PINNED_KEY_NOT_IN_CERT_CHAIN;

    // Recoverable errors
    if (cert_status & CERT_STATUS_AUTHORITY_INVALID)
        return ERR_CERT_AUTHORITY_INVALID;
    if (cert_status & CERT_STATUS_COMMON_NAME_INVALID)
        return ERR_CERT_COMMON_NAME_INVALID;
    if (cert_status & CERT_STATUS_CERTIFICATE_TRANSPARENCY_REQUIRED)
        return ERR_CERTIFICATE_TRANSPARENCY_REQUIRED;
    // CERT_STATUS_NON_UNIQUE_NAME is intentionally not mapped to an error.
    // It is treated as just a warning and used to degrade the SSL UI.
    if (cert_status & CERT_STATUS_NAME_CONSTRAINT_VIOLATION)
        return ERR_CERT_NAME_CONSTRAINT_VIOLATION;
    if (cert_status & CERT_STATUS_WEAK_SIGNATURE_ALGORITHM)
        return ERR_CERT_WEAK_SIGNATURE_ALGORITHM;
    if (cert_status & CERT_STATUS_WEAK_KEY)
        return ERR_CERT_WEAK_KEY;
    if (cert_status & CERT_STATUS_DATE_INVALID)
        return ERR_CERT_DATE_INVALID;
    if (cert_status & CERT_STATUS_VALIDITY_TOO_LONG)
        return ERR_CERT_VALIDITY_TOO_LONG;

    // Unknown status.  Give it the benefit of the doubt.
    if (cert_status & CERT_STATUS_UNABLE_TO_CHECK_REVOCATION)
        return ERR_CERT_UNABLE_TO_CHECK_REVOCATION;
    if (cert_status & CERT_STATUS_NO_REVOCATION_MECHANISM)
        return ERR_CERT_NO_REVOCATION_MECHANISM;

    NOTREACHED();
    return ERR_UNEXPECTED;
}

} // namespace net
